TY - JOUR
T1 - Reactivity of cellulose during hydrothermal carbonization of lignocellulosic biomass.
AU - Volpe, Maurizio
AU - Messineo, Antonio
AU - Mäkelä, Mikko
AU - Barr, Meredith
AU - Volpe, Roberto
AU - Corrado, Chiara
AU - Fiori, Luca
PY - 2020/4/28
Y1 - 2020/4/28
N2 - Hydrothermal carbonization (HTC) of pure cellulose (CE) and birchwood (BW) samples was carried out at temperatures between 160 and 280 °C, 0.5 h residence time and biomass-to-water ratio 1:5, to investigate the reactivity of cellulose in lignocellulosic biomass. Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) showed that the CE samples remained unaltered at temperatures up to 220 °C, but were significantly decomposed at 230 °C producing a thermal recalcitrant aromatic and high energy-dense material. FTIR showed that dehydration and aromatization reactions occurred at temperature equal or higher than 230 °C for the CE samples while a similar increase in aromatization for the BW hydrochars was evident only at temperatures equal or higher than 260 °C. Acid hydrolysis, TGA and FTIR suggested that a higher thermal resistance of naturally occurring cellulose in BW (when compared to CE sample) could be related to a ‘protecting shield’ offered by interlinked lignin in the plant matrix.
AB - Hydrothermal carbonization (HTC) of pure cellulose (CE) and birchwood (BW) samples was carried out at temperatures between 160 and 280 °C, 0.5 h residence time and biomass-to-water ratio 1:5, to investigate the reactivity of cellulose in lignocellulosic biomass. Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) showed that the CE samples remained unaltered at temperatures up to 220 °C, but were significantly decomposed at 230 °C producing a thermal recalcitrant aromatic and high energy-dense material. FTIR showed that dehydration and aromatization reactions occurred at temperature equal or higher than 230 °C for the CE samples while a similar increase in aromatization for the BW hydrochars was evident only at temperatures equal or higher than 260 °C. Acid hydrolysis, TGA and FTIR suggested that a higher thermal resistance of naturally occurring cellulose in BW (when compared to CE sample) could be related to a ‘protecting shield’ offered by interlinked lignin in the plant matrix.
KW - Hydrothermal carbonization; Solid biofuel; Cellulose reactivity; Birchwood; Acid hydrolysis
U2 - 10.1016/j.fuproc.2020.106456
DO - 10.1016/j.fuproc.2020.106456
M3 - Article
SN - 1873-7188
VL - 206
JO - Fuel Processing Technology
JF - Fuel Processing Technology
M1 - 106456
ER -